Improved air-tight cork



J. S. DAVISON.

AIR TIGHT GORK.

No. 40,742. Patented Dec. 1, 1863.

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UNITED STATES PATENT OFFICE,

JOHN s. DAVISON, 0E CRANBERRY, NEW JERSEY.

IMPROVED AIR-TIGHT CORK.

Specification forming part of Letters Patent No. 40,742, dated December1, 1863.

To all whom it may concern.-

Be it known that L'Jotnv S. DAVISON, of Cranberry, in the county ofMiddlesex, in the Stateof New Jersey, have invented a new and ImprovedMode of Rendering Corks Airlight; and Ido hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying draw-" ings, and to the letters of reference markedthereon, making a part of this specification, in which.

Figure 1 is a view of an ordinarily-formed cork-stopper with myinvent-ion applied to its center. Fig. 2 is aview. of a jar-cork formedin two sections with my invention applied to the lower one.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to an improvement in cork-stoppers of alldescriptions. Theobject of the invention is to produce a cork that willbe impervious to the air. This object is attained by the application ofa layer of gutta. percha or other suitable material to the cork, whichwill preventthe air from passing through its pores.

To enable those skilled in the artto fully understand and construct myinvention, I will proceed to describe it.

Figure 1 represents acork which is composed of two sections. A is theupper section, and B the lower'one. On one of these sections a layer ofgutta-percha or other suitable substance is placed, as shown at O inFig. 2, and while warm the other section is applied to it,

thus cementing them firmly together, the guttabe formed in two'or morepieces, and a layer' of guttapercha or other propersubstance put betweeneach piece; orit canbe applied tothe top or bottom of the cork insteadof dividing it. Thislayer of gutta-percha is of greater circumferencethan the cork itself, as shown at d in the two figures, so, that whenthe cork is pressed intoa jar-or bottle this edge will fit close roundthe neck, and thus render it air-tight there also.

Stoppers of cork of all shapes and descriptions can be made in this waybothfor vials, cans, and jars. It will be found very handy andconvenient when applied to fruit-preser vmission of air) to stoppers ofcork, so as to render them impervious to the air in the different waysherein described,.or by other means substantially the same, the wholebeing arranged substantially as and' for the purposes set forth.

JOHN .S. DAVISON.

